METHOD FOR SURVEYING DRILL HOLES, DRILLING ARRANGEMENT, AND BOREHOLE SURVEY ASSEMBLY

摘要

A method is disclosed for surveying drill holes with a drilling arrangement and borehole survey assembly. The method can include providing a drill tool having at least one drill rod and a drill bit assembly, and providing a borehole survey tool having a sensor) for measuring a borehole. In the method a drill tool having a central flushing channel for conducting flushing fluid to the drill bit assembly is used, and the borehole survey tool is arranged in the central flushing channel so that flushing fluid can flow in the central flushing channel past the borehole survey tool.

主权项

1. A method for surveying drill holes, wherein the method comprises:
providing a drill tool having at least one drill rod and a drill bit assembly; providing a borehole survey tool including sensor means for measuring a borehole; arranging the borehole survey tool within the drill tool; drilling with the drill tool a borehole by a drilling process including at least percussive drilling; measuring the borehole by the borehole survey tool to obtain data of the borehole; and processing data of the borehole with data processing means to obtain borehole status information, the drill tool having a central flushing channel for conducting flushing fluid to the drill bit assembly; and arranging the borehole survey tool, during the arranging, in the central flushing channel so that flushing fluid can flow in the central flushing channel past the borehole survey tool.